Improvement in grindinq-mills



Patented Nov. 8, 18641 C. A. HARPER.

Grinding Mill.

iiiii non 55m UNITED STATES PATENT mace,

G. A. HARPER, OF CANTERBURY, NEIV HAMPSHIRE.

IMPROVEMENT IN GRINDING-MILLS.

Specification forming part of Letters Patent No. fi l-$95M), dated November 8, 1864.

To all whom it may concern Be it known that I, G. A. HARPER, of Cantel-bury in the county of Merrimac and State ofNew Hampshire, have invented an improvement in theuse of the steel hand-mill, so as to adapt the same to the manufacture of flour and bolted meal, by which the mill can be turned easily by hand or by any other power, which is new and improved and I do hereby declare that the following is a full and exact description thereof, reference being had to the accompanying drawing, presenting a side and end View, and to the lett rs of reference marked thereon.

Disclaiming the hand-mill itself, the nature of my invention consists in a bolting-chest, so constructed as to answer the purpose of a frame or stand for the mill, and so as to con tain within itself, when packed up for transportation, the mill, bolting-reel, and all the fixtures necessary for the complete operation of the same when put together for use; of a boil ing-reel turned by gearing on a small shaft from an endless screw on main shaft of the mill; of a temperscrew to regulate the fineness of the grinding by pressing on the center of the shaft of the grindingcylinder, and of a feed-regulator and a detachable pulley on the fly-wheel for the application of power other than the hand.

To enable others to niake'and use my invention, I proceed to describe its construction. and operation.

I construct a bolting-chest, 2, about twentysix or thirty inches square, (or it may be no more than about eighteen inches wide,) and from the top in grooves, let down a boltingrcel, a, (at letter A,) about twelve inches in diameter at the one end and fifteen inches at the other, so that the shaft may run horizontally, and allow slope for the bran to escape at the larger end. On the top of this chest (covered) I attach the mill by bolts or screws through the bottom of the frame B, to which the mill is permanently attached, so placed that the ground wheat or corn may be received into the smaller end of the boltingreel through the spout N. 011 the top of the frame B, I attach a feed regulator, with place for hopper, being a frame and shoe, (letter 0,) the shoe having a knocker projecting through the frame, so as to be struck by the arms of the fiy-wheel, as at letter F, and to play backward and forward, producing a jostling motion on a spiral spring on a spindle at the mouth of the shoe L. The mouth of the shoe is elevated or depressed by a cord attached to the spindle and wound on a key, as shown at letter 1). A screw, 70', is also placed under the knock r, penetrating through the frame B, so as to press against the heel of the shoe, regulating the position of the knocker to the arms of the fly-wheel. The bolting-reel is turned by an endless screw, 20, on main shaft 3/ of the mill and gearing on small shaft G. A pulley for the application of power other than by hand (detachable) is placed on the side of the flywheel (letter H) and temper screw on mill-shaft at letter O.

WVhat I claim as my invention, and desire to secure by Letters Patent, is-

The arrangement of the bolting-chest 2, reel w, temper-screw 0, main shaft y, and feedregulator 6, when constructed and operating substantially as described.

O. A. HARPER.

Witnesses N. W. LEIGHTON, E. M. HARPER. 

